Author: Andrew Davis
rating MDL-23908 added info to module config to help the user with rating permissions
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0d54a3985b674446e414d41c5bae35c0bc3a9367
http://github.com/moodle/moodle/commit/0d54a3985b674446e414d41c5bae35c0bc3a9367
+ 2.0 en [rolewarning,core_rating]